#17065: use Maxima's trigrat() in symbolic simplify
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Reporter: rws | Owner:
Type: defect | Status: needs_work
Priority: major | Milestone: sage-6.4
Component: symbolics | Resolution:
Keywords: maxima, | Merged in:
simplification, trigonometric | Reviewers:
Authors: Ralf Stephan | Work issues:
Report Upstream: N/A | Commit:
Branch: | 3db6f899c380523dc6d6e940650eede5984a37fa
u/rws/use_maxima_s_trigrat___in_symbolic_simplify| Stopgaps:
Dependencies: |
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Comment (by kcrisman):
This can even lead to disaster, I think:
{{{
sage: F = (4*cos(9*pi/180)^2 - 3)*(4*cos(27*pi/180)^2 - 3)
sage: F.maxima_methods().trigrat()
sqrt(5) + 2*cos(7/10*pi) - 2*cos(1/10*pi) - 2*I*sin(3/5*pi) +
2*I*sin(2/5*pi) + 1
}}}
I really am not interested in seeing `I` turn up in such a simplification,
regardless of the "correct" answer.
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Ticket URL: <http://trac.sagemath.org/ticket/17065#comment:5>
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